Finding the Fourth Proportional to 2,124.86, 3,187.45 and 892.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.86 : 3,187.45 = 892.09 : x
2. Step 2: Convert to fraction form
   2,124.86/3,187.45 = 892.09/x
3. Step 3: Cross multiply
   2,124.86x = 3,187.45 × 892.09
4. Step 4: Simplify right side
   2,124.86x = 2,843,492.27
5. Step 5: Solve for x
   x = 2,843,492.27/2,124.86
6. Step 6: Final answer
   x = 1,338.20